28 



UNITED STATES AND MEXICAN BOUNDARY. 



List of specimens. 



Catal. 

 No. 



1 



No. of 



spec. 



Age. 



Locality. 



When collected. 



Whence obtained. 



Nature of 

 specimens. 



Collected by — 



649 

 649 



1 



17 



Adult. 

 Young. 



St. Joseph's Island, Tex. . 

 do 



1854 

 1854 



Gust. Wurdemann. . 

 ... do 



Alcoholic . . 

 do 



G. Wurdemann . . . . 

 do 









1. ELEOTKIS SUMNULENTUS, Grd. 



Plate XII, Figs, 1—3. 



Spec Char.— Body sub-fusiform. Head contained about four times and a half in the total length. Snout rounded ; jaws 

 equal ; gape of mouth somewhat oblique ; posterior extremity of maxillary extending to a vertical line intersecting the anterior 

 rim of the orbit. Eye circular ; its diameter entering four times and a half in the length of the side of the head. Branchial 

 isthmus narrow. Second dorsal fin higher than the first ; its posterior rays, like those of the anal, being the longest, and their 

 extremities approximating the base of the caudal when inclined in that direction. Tips of ventrals not reaching the vent. 

 Extremities of pectorals stretching somewhat beyond the ventrals. Caudal fin of the same length as the head, and posteriorly 

 rounded. 



The scales are rather large, as deep as long ; smaller on the upper surface of the head than 

 on the body. 



D VII, 9 ; A 10 ; C 4, 7, T, 4 ; V 5 ; P 14. 



Color reddish brown with interspersed light spots. A black spot above the insertion of the 

 pectorals, and a streak from the eye to the angle of the mouth. Branchial apparatus purplish. 

 Dorsals and anal spotted or barred. Caudal, ventrals, and pectorals greyish olive. 



Plate XII, fig. 1, represents Eleotris sumnulentus , size of life. 

 Fig. 3, one of its dorsal scales. 



List of specimens. 



Fig. 2, its head from above. 



Catal. 

 No. 



No. of 

 spec. 



Age. 



Locality. 



When 

 collected. 



Whence 

 obtained, 



Nature of 

 specimen. 



Collected by— 



641 



1 



Ad't.&Y'g. 



Mouth of Rio Grande del Norte (R. Bravo).. 



1854 



Maj. Emory. . 



Alcoholic. 



Jno. H. Clark 









2. ELEOTEIS GYKINUS, 



Plate XII, Figs. 11 



Cuv. & 



and 12. 



' Val. 





* 



Observ.— The specimen figured being the only one procured by the Commission, we are not 

 prepared to compare it fully with its congeners, and since it approximates closely the species 

 under which name we record it, we have thought advisable to wait until more materials shall 

 be available before any attempt is made to establish either its specific identity with, or difference 



Eleotv 



List of specimens. 



Catal. No. of j Sex. 



No. 



642 



Locality. 



pec 



1 



9 



Mouth of Rio Grande (R. Bravo) 



I 

 When collected. Whence obtained. 



Nature of 

 specimen. 



Collected by 



1854 



Maj. Emory.. .. 



Alcoholic . . John H. Clark 



